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Microsoft Management Console Zone Bypass Vulnerability

Risk

High

Date Discovered

August 8, 2006

Description

Microsoft Management Console (MMC) is prone to a cross-zone scripting vulnerability because the operating system fails to properly restrict access to MMC components, allowing the MMC files to be referenced from the Internet Zone in some cases.
Exploiting this vulnerability could let an attacker execute arbitrary code, completely compromising the computer.

Technologies Affected

Microsoft Windows 2000 Advanced Server

Microsoft Windows 2000 Advanced Server SP1

Microsoft Windows 2000 Advanced Server SP2

Microsoft Windows 2000 Advanced Server SP3

Microsoft Windows 2000 Advanced Server SP4

Microsoft Windows 2000 Datacenter Server

Microsoft Windows 2000 Datacenter Server SP1

Microsoft Windows 2000 Datacenter Server SP2

Microsoft Windows 2000 Datacenter Server SP3

Microsoft Windows 2000 Datacenter Server SP4

Microsoft Windows 2000 Professional

Microsoft Windows 2000 Professional SP1

Microsoft Windows 2000 Professional SP2

Microsoft Windows 2000 Professional SP3

Microsoft Windows 2000 Professional SP4

Microsoft Windows 2000 Server

Microsoft Windows 2000 Server SP1

Microsoft Windows 2000 Server SP2

Microsoft Windows 2000 Server SP3

Microsoft Windows 2000 Server SP4

Nortel Networks MCS5100 - Sun Platform

Nortel Networks Self-Service MPS 100

Nortel Networks Self-Service MPS 1000

Nortel Networks Self-Service MPS 500

Nortel Networks Self-Service Peri Application

Nortel Networks Self-Service Speech Server

Recommendations

Filter access to the affected computer at the network boundary if global access isn't required. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Disable all unnecessary services.

Since a successful exploit of scripting issues often requires executing malicious script code in web clients, consider disabling support for script code and active content within a client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

Do not follow links provided by unknown or untrusted sources.

Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Microsoft has released a security bulletin to address this issue. Please see the references for details.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.

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